dear all this was clicked in cruise with a b777 2000' below me. at first I thought my RA was erroneously reading but everything happens for a reason. I was wondering why 1920' for an a/c 2000 ft below me.
As some of you maybe aware there is an A/c installation delay for b777 about 80', I was forced to co-relate the two. The AID is primarily to cater for a 0' reading at main gear touch down. 80 feet accounts for the length of cable and height of RA transceiver at the bottom of fuselage.
The AID is calculated and is Fixed based on FLARE/Touchfown ATTITUDE of a/c with L/G extended.
here is my doubt -
q1) is 1920 feet actually reflecting AID
2) if yes what about the l/g position. If theoretically I put my gear down will there be an adjustment? Present picture is clicked in cruise with gear up.
3) in ditching on a calm lake with l/g up (l/g up as per ditching proc) will the RA correctly give my height over water?
incase I have assumed wrongly please correct.
this is for academic only and very specific to the b777.
any help is appreciated
Thankyou